Have you ever been out with a near flat battery because you forgot to charge your iPhone? Well, say goodbye to those days with this iPhone external battery. Adding up to 30 extra hours to your iPhone 4/4S, never be out on a limb with a flat battery again.
Talk time, stand by time, Internet browsing, audio and video playback or Wi-Fi use are all increased greatly between charges by one of the world's thinnest power pack to date as it only adds 16mm to the thickness of your iPhone!
With all the features above, as well as eliminating any direct contact signal loss by acting as a "bumper", this external battery is the perfect accessory for the iPhone 4/4S and even better for this fantastic price!